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Histórico da introdução: LG 47LN5400 LED Replacement

Edição por Wayne Seltzer —

Edição aprovada por Wayne Seltzer

Antes
Depois
Sem alteração
dispositivo
LG 47LN5400
Type
replacement
Thing
LED
Title
LG 47LN5400 LED Replacement
Introduction
LEDs were supposed to last forever, right? Well, maybe not.[br]
When one or more backlight LEDs fail in an LCD/LED flat screen television, none of them might turn on.
In the case of the [https://www.lg.com/us/tvs/lg-47LN5400-led-tv|LG 47LN5400], the symptom is a brief flash of the LEDs when first turned on, then a dark screen. Sound is fine.[br]
Apparently, the LED power supply shuts down for the failure of one or more LEDs, leading one to the incorrect conclusion that the power supply has failed. [br]
[br]
This video, “[https://youtu.be/Bf5T2wwtydY|LG No Picture, Screen Flash 47LN5200 47LN5400 47LA6200 47LN5700 47LN5750 47LN5790],” provides excellent troubleshooting and repair steps.[br]
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The easiest way repair is to purchase a complete set of LED strips (12) and replace them all. No soldering. In fact, if one LED has failed, more may fail in the near future.
But, it’s a $45 fix.[br]
[br]
The individual surface-mount LEDs are about $0.11 each, but you need to buy 100 or so to get this price.[br]
[br]
The LED strips have a copper plate, so one needs to use a hot air gun to heat the copper completely, A surface mount hot-air station probably won’t be able to get the copper plate hot enough to melt the solder.[br]
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Time Required Min
1 hora
Time Required Max
2 horas
Imageid
Antes
Depois
Difficulty
Moderate
Conclusion
To reassemble your device, follow these instructions in reverse order.
Author
Wayne Seltzer
Public
Não

Ferramentas

  • Heat Gun x1 added.
  • Phillips #1 Screwdriver x1 added.
  • Multimeter x1 added.
  • Tweezers x1 added.
  • Benchtop Power Supply x1 Need to output 12 volts and 24 volts DC to test LED strips. added.

Peças

  • LATWT470RELZK LEDs x1 added.
  • 12Pcs x 47" LED Backlight Strips Replacement for 47LN5200 47LN5400 47LN5750 47LN5790 47LN541C LC470DUE 6916L-1174A/1175A/1176A/1177A x1 added.

Sinalizadores

  • In Progress added.
  • Community-Contributed Guide added.

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